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The
tegmentumis the area of the medulla that contains the cranial nerve nuclei, the nuclei of the reticular formation, the ascending tracts, and two special nuclei, the inferior olivary nucleus and the dorsal column nuclei (dorsally)
The
tectum:
The dorsal part of the midbrain is seen to have four elevations, named the superior and inferior colliculi. The upper ones are the superior colliculi, and they are functionally part of the visual system, a center for visual reflexes. The lower ones are the inferior colliculi, and these are relay nuclei in the auditory pathway. These colliculi form the
“tectum”(a less frequently used term for these colliculi is the quadrigeminal plate). The pineal, a glandular structure, hangs down from the back of the diencephalon and sits between the colliculi.
What else can I help you with?
The midbrain includes the?
reticular activating system.
Part of brain stem between diencephalon and pons?
The part of the brain stem between the diencephalon and the pons is the midbrain, also known as the mesencephalon. It plays a crucial role in motor movement, auditory and visual processing, and regulating sleep-wake cycles. The midbrain contains structures such as the tectum, tegmentum, and substantia nigra.
What does the midbrain control?
The midbrain controls functions, such as the movement and reflexes of the eyes, hearing, body temperature, and motor control. Other parts of the brain are the cerebellum, cerebrum, and brainstem.
What do the different parts of the human brain do?
CerebrumCerebellumLimbic SystemBrain StemThe nervous system is your body's decision and communication center.The central nervous system (CNS) is made of the brain and the spinal cord and the peripheral nervous system (PNS) is made of nerves. Together they control every part of your daily life, from breathing and blinking to helping you memorize facts for a test. Nerves reach from your brain to your face, ears, eyes, nose, and spinal cord... and from the spinal cord to the rest of your body. Sensory nerves gather information from the environment, send that info to the spinal cord, which then speed the message to the brain. The brain then makes sense of that message and fires off a response. Motor neurons deliver the instructions from the brain to the rest of your body. The spinal cord, made of a bundle of nerves running up and down the spine, is similar to a superhighway, speeding messages to and from the brain at every second.The brain is made of three main parts: the forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum, thalamus, and hypothalamus (part of the limbic system). The midbrain consists of the tectum and tegmentum. The hindbrain is made of the cerebellum, pons and medulla. Often the midbrain, pons, and medulla are referred to together as the brainstem.The Cerebrum: The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called "lobes": the frontal lobe, parietal lobe, occipital lobe, and temporal lobe. Here is a visual representation of the cortex:What do each of these lobes do?Frontal Lobe- associated with reasoning, planning, parts of speech, movement, emotions, and problem solvingParietal Lobe- associated with movement, orientation, recognition, perception of stimuliOccipital Lobe- associated with visual processingTemporal Lobe- associated with perception and recognition of auditory stimuli, memory, and speechNote that the cerebral cortex is highly wrinkled. Essentially this makes the brain more efficient, because it can increase the surface area of the brain and the amount of neurons within it. We will discuss the relevance of the degree of cortical folding (or gyrencephalization) later.(Go here for more information about cortical folding)A deep furrow divides the cerebrum into two halves, known as the left and right hemispheres. The two hemispheres look mostly symmetrical yet it has been shown that each side functions slightly different than the other. Sometimes the right hemisphere is associated with creativity and the left hemispheres is associated with logic abilities. The corpus callosum is a bundle of axons which connects these two hemispheres.Nerve cells make up the gray surface of the cerebrum which is a little thicker than your thumb. White nerve fibers underneath carry signals between the nerve cells and other parts of the brain and body.The neocortex occupies the bulk of the cerebrum. This is a six-layered structure of the cerebral cortex which is only found in mammals. It is thought that the neocortex is a recently evolved structure, and is associated with "higher" information processing by more fully evolved animals (such as humans, primates, dolphins, etc). For more information about the neocortex, click here.The Cerebellum: The cerebellum, or "little brain", is similar to the cerebrum in that it has two hemispheres and has a highly folded surface or cortex. This structure is associated with regulation and coordination of movement, posture, and balance.The cerebellum is assumed to be much older than the cerebrum, evolutionarily. What do I mean by this? In other words, animals which scientists assume to have evolved prior to humans, for example reptiles, do have developed cerebellums. However, reptiles do not have neocortex. Go here for more discussion of the neocortex or go to the following web site for a more detailed look at evolution of brain structures and intelligence: "Ask the Experts": Evolution and IntelligenceLimbic System: The limbic system, often referred to as the "emotional brain", is found buried within the cerebrum. Like the cerebellum, evolutionarily the structure is rather old.This system contains the thalamus, hypothalamus, amygdala, and hippocampus. Here is a visual representation of this system, from a midsagittal view of the human brain:Click on the words to learn what these structures do:ThalamusHypothalamusAmygdalaHippocampusBrain Stem: Underneath the limbic system is the brain stem. This structure is responsible for basic vital life functions such as breathing, heartbeat, and blood pressure. Scientists say that this is the "simplest" part of human brains because animals' entire brains, such as reptiles (who appear early on the evolutionary scale) resemble our brain stem. Look at a good example of this here.The brain stem is made of the midbrain, pons, and medulla. Click on the words to learn what these structures do:MidbrainPonsMedulla
The midbrain includes the?
reticular activating system.
Name the major regions of the midbrain?
The midbrain consists of three major regions: the tectum, tegmentum, and cerebral peduncles. The tectum includes structures like the superior and inferior colliculi, involved in sensory processing. The tegmentum houses structures important for motor control and arousal, while the cerebral peduncles contain fibers connecting the cortex to the brainstem.
What makes up the mesencephalon?
The mesencephalon, also known as the midbrain, is composed of the tectum, tegmentum, and cerebral peduncles. It is involved in sensory and motor functions, as well as other roles such as visual and auditory processing.
Part of brain stem between diencephalon and pons?
The part of the brain stem between the diencephalon and the pons is the midbrain, also known as the mesencephalon. It plays a crucial role in motor movement, auditory and visual processing, and regulating sleep-wake cycles. The midbrain contains structures such as the tectum, tegmentum, and substantia nigra.
What is the function of the tegmentum?
Controls Motor Functions
Does an alligator have a tegmentum?
Yes, Alligators do have a tegmentum it seems! albeit less developed than a human mesencephalon, the alligator midbrain (mesencephalon) has more developed optic tecta instead. However in invertebrates, the tegmentum is the floor of the midbrain. i discovered a report on alligators in lake griffin which specifically referred to the tegmentum. heres the link .. www.jwildlifedis.org/cgi/content/full/44/2/280
What is the Greek word for master builder?
tectum
What does tectum mean in English?
"Roof" or "covering".
What is contained in the tectum of the mesencephalon?
superior and inferior colliculi
Together the superior and inferior colliculi make up what structure?
the tectum
What is the funcion of the tectum?
You put the lime in the coconut and shake the bull up.
What are the two main parts of the midbrain?
cerebral aqueduct which traversing the midbrain divides it into two main parts:Tectum (smaller dorsal part), which consists of = 2 superior and 2 inferior colliculi2 cerebral peduncles (larger ventral part), which consist of = crus cerebri + substantia nigra + tegmentum
